The ionization energy of beryllium is more than that of boron because beryllium has
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The first ionization of Beryllium is greater than that of Boron because beryllium has a stable complete electronic configuration(1s2 2s2)so it requires more energy to remove the first electron from it......whereas boron has the electronic configuration(1s2 2s2 3s1)which needs lesser energy than that of beryllium to remove the valence electron.
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Answer: Be z=4 Econfn 1S22S2 stable configuration. Removal electron from stable configuration needs. More energy.. Compare to Boron.
Explanation:
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